Sharpener



l. B] EN SHARPENER Filed Aug. 17, .1937

FIE-3.5.

ATTORNEY.

Patented Aug. 23, 1938 UNITED STATES PATENT OFFICE SHARPENER Israel Bien, San Francisco, Calif.

Application August 17, 1937, Serial No. 159,581.

1 Claim. (01. 120-90) This invention relates to improvements in sc ews Secured between the blocks 5 and 6 sharpeners and has particular reference to a are plates 8 a Which plates have their pp sharpener for chalk, such as, tailors chalk. margins eXtending y d e margin of h The principal object of this invention is toproblocks a d spread, as best shown in Figs. 2, 3, duoe a simple, inexpensive device which may be a d 5 ese plates a e each provided with an carried in the pocket and used when desired. p r e ll h r eh n h v their ends A further object is to produce a device of this ed n, as shown at l2 a d 3- e Said aperi character which will sharpen the chalk but Which ures p rmit he es pe of h vin s r h k will not wear out the pocket of the user, or will dust which accumulates behind the ed es l2 a d 10 it injure the fingers thereof. 13 during the sharpening operation. These in- 10 Other objects and advantages will be apparent tu ned ends I a d 3 o m Scraping elements during the course of the following description. so that when the chalk is pressed between the In the accompanying drawing forming a part, diverging plates and moved longitudinally, as inof this specification and in which like numdicated in the arrow in Fig. 1, these edges 12 and erals are employed to designate like parts l3 will contact the outer sides of the chalk A 15 15 throughout the same, and will scrape therefrom excess material until Fig. 1 is a side elevation of my device, showhe alk h s been p p r y sharpeneding the same in use; It will thus be seen that I have produced a Fig. 2 is a top plan view of Fig. 1 on an endevice which will perform all the objects above larged scale; set forth. 20

Fig. 3 is an end elevation of Fig. 2; It is to be understood that the form of my in-- Fig. 4 is an end elevation of a piece of sharpvention herewith shown and described is to be ened chalk; and taken as a preferred example of the same and Fig. 5 is a cross sectional view taken on the that various changes relative to the material, line 55 of Fig. 2. size, shape and arrangement of parts may be re- 25 Tailors chalk is cast in blocks and is relaed to W ut departing from the Spirit Of tively hard in comparison to the ordinary chalk the invention or the scope of the subjoined claim. used with black boards. Tailors chalk is used Having thus described my invention,I claim:-- for the purpose of marking upon cloth lines to In a device of the character described, a pair be followed in stitching, positioning of buttons, of blocks, a pair of plates secured between said 30 etc. In order that the line may be accurate, it blocks, said plates each having a portion thereof is necessary to sharpen this chalk along one side diverging beyond the margin of said blocks, each thereof so that the line made on the cloth will of said plates having an aperture formed in its.

be clear and of fine proportions in counter-disdiverging portion, each of said plates having the 3 tinction to a heavy or wide line. ends of its diverging portion bent so as to form In the accompanying drawing wherein for the scraping elements angularly disposed with relapurpose of illustration is shown a preferred emtion to each other.

bodiment of my invention, the numerals 5 and 6 ISRAEL BIEN.

designate a pair of blocks, held together by 

